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b2d259060d
Currently ASan instrumentation pass creates a string with global name for each instrumented global (to include global names in the error report). Global name is already mangled at this point, and we may not be able to demangle it at runtime (e.g. there is no __cxa_demangle on Android). Instead, create a string with fully qualified global name in Clang, and pass it to ASan instrumentation pass in llvm.asan.globals metadata. If there is no metadata for some global, ASan will use the original algorithm. This fixes https://code.google.com/p/address-sanitizer/issues/detail?id=264. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212872 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.7 KiB
LLVM
83 lines
2.7 KiB
LLVM
; RUN: opt < %s -asan -asan-module -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-unknown-linux-gnu"
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@xxx = global i32 0, align 4
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; If a global is present, __asan_[un]register_globals should be called from
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; module ctor/dtor
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; CHECK: llvm.global_ctors
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; CHECK: @__asan_gen_ = private constant [8 x i8] c"<stdin>\00", align 1
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; CHECK: llvm.global_dtors
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; Test that we don't instrument global arrays with static initializer
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; indexed with constants in-bounds. But instrument all other cases.
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@GlobSt = global [10 x i32] zeroinitializer, align 16 ; static initializer
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@GlobDy = global [10 x i32] zeroinitializer, align 16 ; dynamic initializer
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@GlobEx = external global [10 x i32] , align 16 ; extern initializer
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; GlobSt is declared here, and has static initializer -- ok to optimize.
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define i32 @AccessGlobSt_0_2() sanitize_address {
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entry:
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%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 0, i64 2), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobSt_0_2
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; CHECK-NOT: __asan_report
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; CHECK: ret i32 %0
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}
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; GlobSt is accessed out of bounds -- can't optimize
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define i32 @AccessGlobSt_0_12() sanitize_address {
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entry:
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%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 0, i64 12), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobSt_0_12
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; CHECK: __asan_report
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; CHECK: ret i32
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}
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; GlobSt is accessed with Gep that has non-0 first index -- can't optimize.
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define i32 @AccessGlobSt_1_2() sanitize_address {
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entry:
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%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobSt, i64 1, i64 2), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobSt_1_2
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; CHECK: __asan_report
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; CHECK: ret i32
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}
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; GlobDy is declared with dynamic initializer -- can't optimize.
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define i32 @AccessGlobDy_0_2() sanitize_address {
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entry:
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%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobDy, i64 0, i64 2), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobDy_0_2
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; CHECK: __asan_report
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; CHECK: ret i32
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}
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; GlobEx is an external global -- can't optimize.
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define i32 @AccessGlobEx_0_2() sanitize_address {
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entry:
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%0 = load i32* getelementptr inbounds ([10 x i32]* @GlobEx, i64 0, i64 2), align 8
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ret i32 %0
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; CHECK-LABEL: define i32 @AccessGlobEx_0_2
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; CHECK: __asan_report
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; CHECK: ret i32
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}
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!llvm.asan.globals = !{!0}
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!0 = metadata !{[10 x i32]* @GlobDy, null, null, i1 true, i1 false}
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; CHECK-LABEL: define internal void @asan.module_ctor
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; CHECK-NOT: ret
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; CHECK: call void @__asan_register_globals
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; CHECK: ret
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; CHECK-LABEL: define internal void @asan.module_dtor
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; CHECK-NOT: ret
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; CHECK: call void @__asan_unregister_globals
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; CHECK: ret
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